import java.io.*;

import javax.crypto.*;

public class Skey_DES{ 

         public static void main(String args[]) throws Exception{

                  KeyGenerator kg=KeyGenerator.getInstance("DESede");

                  kg.init(168);

        SecretKey k=kg.generateKey( );

        FileOutputStream  f=new FileOutputStream("key1.dat");

             ObjectOutputStream b=new  ObjectOutputStream(f);

             b.writeObject(k);

    }

}